Thrasher, I have had no problems with their menus or search using Firefox, just the normal build - 26.0 as of now. Have you tried starting Firefox in Safe mode to see if an addon or extension is causing the issue? Help menu, Restart With Addons Disabled or holding down Shift when starting FF?

I pretty much have all the games on GoG that I am interested in. There are plenty more that I would like, the old SSI EOB and Gold Box games for instance, but they may have trouble getting the rights to distribute them.